mirror of
https://github.com/danog/liquid.git
synced 2024-12-06 06:08:52 +01:00
51 lines
1.3 KiB
Go
51 lines
1.3 KiB
Go
package expression
|
|
|
|
import (
|
|
"fmt"
|
|
"testing"
|
|
|
|
"github.com/stretchr/testify/require"
|
|
)
|
|
|
|
func TestContext_runFilter(t *testing.T) {
|
|
cfg := NewConfig()
|
|
constant := func(value interface{}) valueFn {
|
|
return func(Context) interface{} { return value }
|
|
}
|
|
receiver := constant("self")
|
|
|
|
// basic
|
|
cfg.AddFilter("f1", func(s string) string {
|
|
return "<" + s + ">"
|
|
})
|
|
ctx := NewContext(map[string]interface{}{"x": 10}, cfg)
|
|
out := ctx.ApplyFilter("f1", receiver, []valueFn{})
|
|
require.Equal(t, "<self>", out)
|
|
|
|
// filter argument
|
|
cfg.AddFilter("with_arg", func(a, b string) string {
|
|
return fmt.Sprintf("(%s, %s)", a, b)
|
|
})
|
|
ctx = NewContext(map[string]interface{}{"x": 10}, cfg)
|
|
out = ctx.ApplyFilter("with_arg", receiver, []valueFn{constant("arg")})
|
|
require.Equal(t, "(self, arg)", out)
|
|
|
|
// TODO optional argument
|
|
// TODO error return
|
|
|
|
// closure
|
|
cfg.AddFilter("add", func(a, b int) int {
|
|
return a + b
|
|
})
|
|
cfg.AddFilter("closure", func(a string, expr Closure) (string, error) {
|
|
value, err := expr.Bind("y", 1).Evaluate()
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return fmt.Sprintf("(%v, %v)", a, value), nil
|
|
})
|
|
ctx = NewContext(map[string]interface{}{"x": 10}, cfg)
|
|
out = ctx.ApplyFilter("closure", receiver, []valueFn{constant("x |add: y")})
|
|
require.Equal(t, "(self, 11)", out)
|
|
}
|